Ok I think it's all good now... I neglected to uninstall my older version of java before downloading the new one, and though doing so caused my computer to have its second critical error in its lifetime, of which I don't know how to fix apart from flicking off the power, limewire has decided to work again. Thanks for your help anyhow, if it happens again I'll try your advice.

And yes, I did get my original Basic version from Limewire.com, not my pro version however... that I got through my *********. But this error caused me to go back to basic anyway.